Step 1:
The first step to converting 15401.638720425 to a fraction is to re-write 15401.638720425 in the form p/q where p and q are both positive integers. To start with, 15401.638720425 can be written as simply 15401.638720425/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 15401.638720425, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 15401.638720425/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 15401.638720425/1 each by 1000000000:
Step 3:
Now the last step is to simplify the fraction (if possible) by finding similar factors and cancelling them out, which leads to the following answer for 15401.638720425 as a fraction:
169418/11 / 1